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What is the db level for heavy vehicles in India?

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What is the db level for heavy vehicles in India?

(a) 70

(b) 75

(c) 77

(d) 80

This question was posed to me in an interview.

This question is from Legal Acts of Noise Pollution topic in division Environmental Pollution of Energy Management

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The correct answer is (d) 80

For explanation: Decibel (db) is the unit of noise. There are different noise limits for vehicles as well depending upon the capacity of their engines. 80 db is the standard noise limit which has been accepted by Government of India for heavy vehicles.

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